syntax = "proto3";

package chat;

import "google/protobuf/empty.proto";

message ChatMessage {
  string messageId = 1;
  string fromUserId = 2;
  string toUserId = 3;
  string toRoomId = 4;
  string content = 5;
}

message Room {
  string name = 1;
}

message UserList { repeated User users = 1; }

message RoomList {repeated Room rooms = 1;}

message User { string username = 1; }

// RPC Messages

message JoinResponse {}

message RoomAction {
  string roomId = 1;
  string userId = 2;
  string action = 3;
}

service Chat {
  // Rooms
  rpc roomAction(RoomAction) returns (JoinResponse) {}

  // Messages
  rpc sendMsg(ChatMessage) returns (google.protobuf.Empty) {}
  rpc receiveMsgs(google.protobuf.Empty) returns (stream ChatMessage) {}

  // List
  rpc listRooms(google.protobuf.Empty) returns (RoomList) {}
  rpc getAllUsers(google.protobuf.Empty) returns (UserList) {}
}